Separable dispenser top



Feb. 2, 1965 R. H. UNDERWOOD ETAL SEPARABLE DISPENSER TOP Filed Sept.11, 1963 ROLAND I'LUNDERWOOD 2; ROBERT M.M1TCHE,LL

ATTORNEYS United States Patent Oflice 3,168,226 Patented Feb. 2, 19653,168,226 SEPARABLE DISPENSER TOP I Roland H. Underwood, Irvington,N.Y., and Robert M. Mitchell, South Norwalk, Conn., assignors, by mesneassignments, to General Foods Corporation, White Plains, N .Y., acorporation of Delaware Filed Sept. 11, 1963, Ser. No. 308,151 11Claims. (Cl. 222-472) This invention relates to an improved separabledispenser top designed to be removably attached as by screw threads tojars or bottles containing various types of fluent materials to bedispensed therethrough.

The invention contemplates the provision of a combined base and handlestructure formed in a unit and provided with internal screw threadsregistering with the outer, peripheral screw threads disposed about theneck of the bottle or container, by which the base is maintained inposition thereon. The invention further contemplates the provision of aresilient valve or closure member registering with the upper or neckportion'of the base and removably engaged therein by means of adownwardly disposed male tongue registering in a mating, tapered slotdisposed between the rear wall and the handle member of the said neck orbase member of the cap or closure structure.

The aforesaid downwardly extending male tongue of the top or valvestructure-lot the closure is preferably downwardly tapered to fit theaforesaid downwardly tapered female recess in the base structure andispreferably angularly shouldered at its forward lateral edges to providewedging or camming surfaces thereon and at its lower, rearward lateralextremities is provided with outwardly extending studs which maintainthe downwardly projecting tongue firmly in position in the female recessin the base, when fully seated therein.

The invention further contemplates the formation of both the base andclosure cap structures of a plastic material, such as a vinyl resin,pyroxylin or other plastic.

It further contemplates the provision of a forwardly reduced fiexuresection in the rear extremity of the cap adjacent the downwardlyprojecting tongue, to provide an area of resiliency at the rear portionof the cap adjacent the tongue. An angular disposed actuating lever,designed to be contacted by the thumb of the operator, is positioned inthe cap just forwardly of the reduced flexure section thereof and isinclined rearwardly over the top of the handle member.

The closure structure of the present invention is preferably made in twoparts, i.e.,-an integral base and handle section and a removable cap orclosure section so that the structure may be disassembled readily forwashing when it is used to dispense viscous material such as syrup orheavy salad dressing or analogous fluent materials.

Referring to the drawings:

FIG. 1 is a perspective view, taken from one side and from the rear, ofthe assembled closure structure in position on a container, in fullyclosed position;

FIG. 2 is an exploded view taken from above and from the side, partiallyin phantom, of the valve or cap structure vertically removed from thebase and pouring spout structure;

FIG. 3 is a detailed perspective view, partially broken away, of therear portion of the cap or closure member, taken from below, showing.the downwardly projecting male retaining tongue at the rear extremitythereof and its two forwardly disposed, downwardly reduced cammingsurfaces and rearwardly disposed studs;

FIG. 4 is a vertical, cross section view of the assembled cap and basestructures, partially in phantom, and partially broken away, showing themale retaining tongue fully seated in the corresponding female slot inthe base member; q

FIG. 5 is a fragmentary perspective view, taken from above, of the rearextremity of the base member of the closure showing the female slot andshoulder provided in the rear, upper extremity of the base member forthe reception of the male retaining tongue of the cap structure;

FIG. 6 is a fragmentary, vertical cross-sectional view taken on line 6-6of FIG. 5; and

FIG. 7 is a vertical, cross-sectional view, taken on line 7-7 of'FIG. 5.

In the drawings, 10 designates broadly the cylindrical neck portion ofthe base unit designed to engage over the corresponding cylindrical neckportion of a suitable container 11. "As shown, cylindrical neck portion10 is provided at its upper interior with male threads 12 designed toregister in corresponding threads provided about the outer periphery ofthe neck of the container 11.

At its forward extremity, as shown in FIGS. 1, 2 and 4, cylindrical baseportion 10 is provided with an upwardly and outwardly extended andenlarged pouring spout sectionl3 which is outwardly rounded anddownwardly curved or recessed at its center outer extremity 14. Anelliptical, downwardly extending handle or grasp means 15 is provided atthe rear extremity of cylindrical base 10 and, as shown, is madeintegral with base 10. Handle 15 is preferably provided with an open,elliptical interior orifice for receiving the fingers of the hand and atits lower extremity is provided with a downwardly extending, curved footmember 16 designed to bear against the outer surface of the containerupon which base member 10 is fitted.

Disposed between the upper, forward extremity of handle 15 and the wallof cylindrical base 10 is a downwardly reduced, wedge-shaped orifice 17which is formed in the rear wall of base 10 just forwardly of handle 15.Arifice 17 is, as aforesaid, downwardly reduced and is provided withrectilinear inner walls, for a purpose hereinafter to be discussed atmore length. Provided in the interior of base 10 just forwardly of theforward upper edge of orifice 17 is a rectilinear, vertical shoulder 18,for a purpose hereinafter to be more fully discussed.

About its inner, upper periphery base 10 is provided with an angular,peripheral shoulder section 19 of smaller inner diameter than lower necksection 10 thereof, defining a circular "orifice therewithin. Peripheralshoulder 19 also acts as a bearing surface within cylindrical base 10against which the upper surface of the neck of the container fits flushwhen base member 10 is fully seated thereon by means of screw threads12.

It will be noted that the lower extremity of downwardly reduced slot 17terminates an appreciable distance above the lower peripheral neck 20 ofbase 10, thus providing a lower shouldered section 21 on base .10between its lower edge 20 and the lower extremity of slot 17.

Referring now to the removable cap or valve portion 22 of the closurestructure, it will be seen that it is appropriately curved and fitted toclosely engage the upper. peripheral edges of the upper. and spoutsection 13 of base 10 and is closely mated thereover throughout itsperiphery. At its forward extremity, cap or valve member 22 is providedwith an outwardly and downwardly curved tongue section 23 which ispreferably chamfered about its edges at 24 to make a close and sealingfit with inwardly chamfered edges 25 about the neck of base 10.

At its rear, lower extremity cap 22 is provided with a downwardlyextending wedge-shaped male tongue 26 designed to be slid downwardlyinto and mounted within female slot 17 provided in base :10 justforwardly 'of handle 15 thereof. At its :forward, upper lateralextremities, tongue 26 is provided with angular camming or wedgesurfaces 27 and 28 which are preferably of substantially the same widthat their upper extremities as the female slot 17 at its upper extremityand which, as shown, are preferably downwardly reduced toward the lowerextremity 29 of tongue 26. At their lower extremities wedge-shapedprotrusions 27 and 28 of tongue'26 are preferably shouldered at- 30 and31. As shown in FIGS. 2, 3 and 4'} tongue 26 is of reduced thickness atits lower extremity 32 and is provided in its center, forward sectionwith an upwardly reduced linear boss 33.

At its rear, lateral extremities tongue 26 is provided with twooutwardly projecting studs 34 and 35 designed to snap into positionunder the rear shoulder behind the rear edge of female slot 17 whentongue 26 is fully seated in slot 17, as will hereinafter be discussedat more length.

Made integral with the upper surface of cap 22 is a thumb lever or tab36, which is preferably molded integral with the rear portion of cap 22and is angularly inclinedrearwardly thereover, extending to a pointrearwardly of the rear edge of cap 22, over tongue 26 thereof. Thumb tab36 is braced on cap 22 by means of integral brace 37. Thumb tab 36 ispreferably of sufficient length to extend rearwardly to a point adjacentand above the upper, forward extremity of handle 15, where it may bereadily contacted by the thumb of the operator. When in fully depressedcondition the extremity of thumb tab 36 bears against the upper, forwardshoulder of handle 15, which serves as a stop therefor to preventstressing of the rear flexure section 38 ofcap 22 beyond its elasticlimit. I

Referring to FIG. 4 of the drawings, it will be seen that the rearflexure section 38 of cap 22, between brace 37 of thumb tab 36 andtongue 26 thereof, is of reduced thickness.

It will be noted that the thickness of the rear flexure section 38 ofcap 22, between brace 37 and, tongue 26 is not uniform, but is graduatedin inverse proportion to the width of said rear flexure section (seeFIG. 4). The purpose of this graduated thickness is so that anycross-section through said rear flexure section 38 along a planeparallel to the flexure axis has a cross-sectional surface area equal tothe surface area of any other such cross-section. This constructiondistributes the flexing stress throughout the whole area of the rearflexure sec tion 38. As a result of this cross-sectional configurationof rear flexure section 38, the flexing strain progresses along saidsection 38 from brace 37 rearwardly to the tongue 26 as the cap 22 isforced from fully closed to fully open position, in which position theextremity ofthumb tab 36 bears against the upper, forward shoulder ofhandle 15. This cross-sectional structure eliminates rearward portion ofreduced section 38 of cap 22, for

a purpose hereinafter to be discussed in-more detail.

Referring now specifically to tongue 26, it will be noted that its lowerextremity is of reduced thickness comparable to the width of the lowestextremity of female 1 in female slot .17 and, due to therearwardpressure slot 17 and'that, due tothe pr'ovision of downwardly reducedshoulders or camming surfaces 27 and 28, extending inwardlyinparallelrelation from its upper lateral extremities tongue 26 may be readilyintroduced into female slot 17, from above, as shown in FIG. 2. Fur-Ither, tongue 26, being of slightly less width than female orifice 17 andof less thickness at its lower extremity than the upper section of slot17 may be readily introduced downwardly therein until the shoulders30and 31 .of

tongue wedges 27 and 28 begin to bear against the lower, forward wall ofslot 17. An exertion of downward pres-r sure at this point against tab36 will seat tongue 26 fully exerted by cam surfaces 27 and 28 againstthe forward wall of slot 17 and the inherent resiliency of tongue 26, asstuds 34 and 35 atthe lower, rear, lateral extremities of tongue 26clear the lower, rear edges of slot 17 they will spring outwardlythereunden-thus holding tongue 26 fully seated in slot 17. Y

As aforesaid, as tongue 26 is 'forced progressively downwardly indownwardly .tapered'slot 17 in the rear of base 10, angular cammingsurfaces-27 and 28 exert more and more influence against the innervertical wall of slot 17 thus progressively forcingthe lower extremity29 of tongue 26 rearwardly whereby when studs 34 and 35 clear the lowerextremity of slot 17 they are forced rearwardly into engagement underthe shoulder s at the lower rear edge of slot 17, as shown in FIG. 4,thus holding tongue 26 fully seated in seat 17.

To release studs 34 and 35 from under shoulder s at the lower rear edgeof slot 17 it is merely necessary to apply upward pressure under thumbtab 36, forcing tongue 26 upwardly and by virtue of the camming actionof surfaces 27 and 28 and. reduced pressure thereagainst, studs 34 and35 will be forced inwardly out of engagement with the rear shoulders ofslot 17, due to the inherent resiliency of tongue 26, and will thus freeengagement therewith whereby cap 22 may be removed from the top 10,tongue '26 being free in slot 17.

Boss 33 also enters into the picture as it impinges against the lower,forward wall of slot 17 and thus tends to force studs 34 and 35rearwardly as tongue 26 penetrates slot 17. The reverse is true astongue 26 is forced upwardly in slot 17.

It will be seen that, dueto the downwardly reduced configuration of slot17 and the downwardly reduced configuration of tongue 26 that tongue 26may be readily inserted into slot 17 without the exertion of anypressure whatsoever until the lower extremity of tongue 26 nears thelower extremity of slot 17. At'this point, wedges 27 and 28 begin tobind in slot 17 and, as aforesaid, the exertion of comparatively slightdownward pressure on thumb tab 36 of cap 22 will then force tongue 26downwardly to the bottom of slot 17, studs 34 and 35 being forcedbeneath the lower edge of slot 17.

As aforesaid, the crux of this invention lies in the mating tongue andslot structure 26-17 for removably, yet fixedly connecting cap 22 andbase 10 of the closure structure. As aforesaid, slot 17, located in base10 just ahead of the upper extremity of handle 15 is downwardly tapered,on both lateral and longitudinal walls, to provide a progressively,downwardly reduced wedge-shaped female recess substantially verticallydisposed on the rear section of base 10 aligned in the same verticalplane with handle 15. At the lower, rear extremity of slot 17 a smallshoulder s is provided to seat studs 34 and 35 of tongue 26' when thelower extremity of tongue 26 has been forced beneath the lower, reducedend of slot 17.

Referring specifically'to tongue 26, it is also of progre'ssivelydownwardly reduced, wedge-shaped configuration, conforming in overalldimensions to the configuration ofslot 17 while being slightly reducedin said dimensions for ready penetration within slot 17. Downwardlytapered camming or wedge surfaces 27 and 28 are provided at the upper,lateral edges of tongue 26, disposed at right angles thereto andextending inwardly therefrom and downwardly tapered in a smooth curve,their upper extremities building up" the upper width of tongue 26 to awidth approximating that of the upper extremity of slot 17.

"Upwardly reduced center boss 33 is also provided recv and 35 undershoulder s when tongue 26 has fully penetrated slot 17. Thus, it will beseen that the overall dimensions of tongue 26 are substantiallyanalogous to those of slot 17, while sufficiently reducedfor readypenetration of tongue 26 fully into slot 17.

Reduced section 38' of cap 22, lying between the upper extremity oftongue 26 and'the lower, rear extremity of thumb lever 36 acts as aresilient hinge, resting as it does on the upper surface of lateralshoulder 18 disposed across the upper face ofslotl7. Thus,downward'pressure on thumb lever 36 'will flex section 38 in an upwarddirection, as it bears against shoulder 18 andthus will'raise nose 23 ofcap 22 out ofiengagement with the'peripheral lip of pouring spout 13, asshownin'FIG, 4, providing a pouring orifice about the entire outerperiphery of pouring spout 13. Conversely, release of pressure againstthumb lever 36 will cause'cap 22 andits outer curved-nose 23 to snapdownwardly over pouring'spout 13, due to theinherent resiliency ofsection 38 thereof, to-seal'cap'22 and its curved nose portion 23against the'peripheral edges of pouring spout'section 13-of base 10. Asaforesaid,.the

edges of cap 22 andnose 23 thereof, outwardly of thumb lever 36, areinwardly chamfered as at 24 to'register with complementarily chamferededges 25 of pouring'spout 13 to provide a tightseal completely aroundthe mating peripheries of pouring spout 13 and nose portion 23 of cap22.

By virtue'of the screw threads 12 provided about the interior ofbase'lo'the entire pouring spout and cap structure, including handle 25may be readily applied to or removed from the' neck of a complementarilyscrewthreaded containen. Further, due to the tongue'and'slot connectionbetween cap'22 and base the entire cap structure 22" may be readilyremovedfrom base'10; without removing base 10-from the neck of thecontainer, by merely applying upward pressure under thumb lever 36,

forcing tongue 26-upwardly in slot 17 to unseat studs 34 and 35thereof'from beneath'shoulder s-at the rearlower edge of slot 17.. Assoon'as studs 34 and 35 are'unseated from shoulder s theentire cap'andtongue'structure may be lifted off of base 10 for cleaning, asrequired; The

provision of this-tongue'and-slot connecting structure also make the'structure readilyusable as an open pouring pitcher, eliminating'capstructure 22, when'desired.

The invention-is susceptible of numerous modifications withoutdepartingfrom the spirit thereof.

The material utilized may be a vinyl resin,.or other plastic or even'aresilient metal. An important aspect of the invention lies in the novelmating. tongue and slot structure. removably connecting the cap and thebase, providing resilient hinge means therebetween at the rear extremityof the assembly.

The size of the structure may be varied widely, depending upon the size.andcapacity of the container to which it is applied.

Attention' is directed to the appended claims for a limitation of thescope of this-invention.

What is claimed is: v

1. In a separable pouringspout and valve structure, a base,.a pouringspout at the forward extremity of said base, a handle made integralwithsaid'base extending downwardly from its rear extremity, a downwardlyreduced recess in' said base adjacent said handle disposed in thesame'vertical plane: as said handle, a cap means fitting ov'er saidbaseand conformed at its forward extremity to thepouring spoutsectionthereof,.a downwardly reduced, Wedge-shaped tongue aflixedbeneaththelower, rear extremity of said cap fittingwithin said downwardly reducedrecess in said base, a reduced fiexure section in the rear extremity ofsaid cap extending forwardly of said tongue and of progressivelydecreasing. forward thickness,- studs disposed at the rear, lateralextremities of said tongue'wh'ereby it may be removably seated in saidrecess.

2. In a separable pouring spout and'valve structure, a base, a pouringspout at the forward extremity of said base, a handle made integral withsaid base extending downwardly from its rear extremity, a downwardlyreduced recess in said base udjacent'said handle and disposed in thesame vertical planeassaidl handle, a cap means fitting over said baseandconformed at its forward extremity to'the pouringfspoutsection thereof,a wedgeshaped tongue affixed beneath the lower, rear extremity of saidcap fitting within said' downwardlyreduced 1 recess in said base,vertically disposed,'.downwar'dly reduced parallelwedgesextending'inwardly fromthe upper, lateral edgesof said tongue,'studsdisposed at the-rear, lateral extremities ofsaid tongue whereby itmay be removably seated in saidrecess.

3 Ina separable pouring'spoutand'valve structure, a base, a pouringspoutv at-the forward extremity of said base, a handle made integralwith' said base extending downwardly from 'its rear extremity, a;downwardly reduced recess in" said base" adjacent said handle anddisposed in the same vertical plane as said. handle, a cap means-fittingover said'base and' conformed atits=forward extremity to the pouringspout. section thereof, a: thumb lever integralwith said cap andextending' rearwardlyover the rear section thereof, adownwardlyred'uced,iwedgeshaped tongue beneath" the." lower,. rear"extremity of" said cap fittingwithin-said downwardlyreduced recess insaid base, a reduced fiexure' section -inthe rear extremity of saidcap-between said thumb lever: andvsaid. tongue of progressivelydecreasingforwardthickness, studs'disposed at the rear, lateralextremities ofisaid tongue'whereby it' may be removably seatedinsaid-recess'.

4. In a separable pouring spout andi valve structure, a base; a pouringvspout at the forward extremityofsaid base, a' handle made integral withsaid. base: extending downwardly fromits.rear 'extrernity,.a. downwardlyreduced recess in said base adjacent said 'handler and downwardlydisposed-inthe same-vertical plane as said'handle, a cap'meansfittingover said. base and? conformed? at its forward extremity to thepouring'spout': section thereof, a thumblever integral with said? capand extending: rearwardly from the rear section thereof, adownwardlyextended; wedge-shaped tongue aifi xed beneath the lower, rear extremityof said cap'fitting'with'saiddownwardly reduced recess'in said base,studs disposed'at thesrear, lateral extremities-of said tongueandareduced flexure section at the rear ofsaid cap between said lever'andsaid tongue of progressively decreasing forward thickness.

5. In a separable pouring spout:andivalve-structure.for containers, acylindricalbase, screw threads within said base, an outwardlyenlarged'fiange about the upper extremity of said base elongated at itsforward extremity into a pouring. spout, a handle affixed to'said base'at the rear'extremity thereof and extending downwardly therefrom, adownwardly reduced recess insaid base: vertically disposed thereinadjacentthe forward; upper. extremity of saldhandle, cap meansshaped toconform to the flange and pouring. spout of said: base, awedge-shaped',down- I wardly reduced tongue. afiixed to' the rearsection of said cap'means and extending. downwardly therefrom mating in saidrecessinsaidbase; studs. disposedat' the rear, latera1 extremities of'said "tongue: toremovably seat it-within said recess.

6. In a separable. pouring: spout and 'valve structurefor containers, acylindrical base, screw threads within said base, an outwardly enlargedfiange'a'bout' the upper extremity of said base elongated at its'forwardextremity mtoa pouring, spout, ahandleafiixed to said' base: at the rearextremity thereof and extending. downwardly therefrom, a downwardlyreduced recess-in said basevertically disposed therein adjacent-theforward, upper. extremity of said handle, cap means shaped toconformlto'the flange and pouring-:spoutof said base; a downwardly reduced tongueatfixed un'der the rear section of said cap means and extendingdownwardly therefrom'mating' in saidrecess in said base, downwardlyreduced wedges disposed in parallel' along: the forward, lateraliedg'esof'said tongue, studs removably-seat it within saidrecess 7. In aseparable pouring spout and valve structure for containers, acylindrical base, screw threads within said base, an outwardly enlargedflange about the upper extremity of said base elongated at its forwardextremity into a pouring spout, a handle aflixed to said base at therear extremity thereof and extending downwardly therefrom, a downwardlyreduced recess in said base vertically disposed therein adjacent theforward, upper extremity of said handle, cap means shaped to conform tothe flange and pouring spout of said -base, a thumb lever angularlydisposed at the rear extremity of said cap extending rearwardlytherefrom over the upperextremity ofsaid handle, a tongue affixed to therear section ofv said cap means and extending downwardly therefrommating in said recess in said base, a forwardly reduced flexure sectionin said cap between said tongue and said lever, downwardly reducedwedges disposed in parallel along the forward, lateral edges of saidtongue, studs disposed at the rear, lateral extremities of said tongueto removably seat it within said recess.

8. In a separable pouring spout and valve structure for containers, acylindrical base, screw threads within said base, an outwardly enlargedflange about the upper extremity of said base elongated at its forwardextremity into a pouring spout, a handle affixed to said base atv therear extremity thereof and extending downwardly therefrom, a downwardlyreduced recess in said base vertically disposed therein adjacent theforward, upper extremity of said handle, cap means shaped to conform tothe flange and pouring spout of said base, a thumb lever angularlydisposed at the rear extremity of said cap extending rearwardlytherefrom over the upper extremity of said handle, a tongue affixed tothe rear section of said cap means and extending downwardly therefrommating in said recess in said base, downwardly reduced wedges disposedin parallel along the forward, lateral edges of said tongue, studsdisposed at the rear, lateral extremities of said tongue and a sectionof reduced thickness in said cap between the base of said thumb leverand said tongue.

9. In a separable pouring spout and valve structure for containers, acylindrical base, screw threads within said base, an outwardly enlargedflange about the upper extremity of said base elongated at its forwardextremity into a pouring spout, a handle affixed to said base at therear extremity thereof and extending downwardly therefrom, a downwardlyreduced recess in said base vertically disposed therein adjacenttheforwardupper; extremity of said handle, cap meansshaped to conformtothe flange and pouring spout of said base, a tonguealfi'xed to the rearsection of said cap-means and extendingdownwardly therefrom mating insaid recess in said base, a centrally disposed, upwardly reduced boss-inthe forward, lower surface of said tongue, studs disposed at the rear,lateral extremities of said tongue to removably seat it within saidrecess. .t a v 10. In a separable pouring spout and valve structure, abase, a pouring spout at the forward extremity of said base, a handlemade integral with said base extending downwardly from its rearextremity, a downwardly reduced recess in said base forward of saidhandle disposed in the same vertical plane as said handle, cap meansfitting over said base and conformed thereto, a wedge-shaped tongueaffixed beneath the lower rear extremity of said cap means fittingwithin said recess in said base, a thumb lever affixed to the uppersurface of said cap means forwardly of said tongue, a flexure section ofreduced thickness between said lever and said tongue at the rear of saidcap means of increasing rearward thickness in inverse ratio to thedecreasing width of said cap means at its rear extremity.

11. In a separable pouring spout and valve structure, a base, a pouringspout at the forward extremity of said base, a handle made integral withsaid base extending downwardly from its rear extremity, a downwardlyreduced recess in said base forward of said handle disposed in the samevertical plane as said handle, cap means fitting over said base andconformed thereto, a wedge-shaped tongue affixed beneath the lower rearextremity of said cap means fitting within said recess in said base, athumb lever affixed to the upper surface of said cap means forwardly ofsaid tongue, a reduced flexure section between said lever and saidtongue of progressively increasing rearward thickness.

References Cited in the file of this patent UNITED STATES PATENTS2,312,584 Peterson Mar. 2, 1943 2,805,561 Emmert et a1 Sept. 10, 19573,101,870 'Betner Aug. 27, 1963

1. IN A SEPARABLE POURING SPOUT AND VALVE STRUCTURE, A BASE, A POURINGSPOUT AT THE FORWARD EXTREMITY OF SAID BASE, A HANDLE MADE INTEGRAL WITHSAID BASE EXTENDING DOWNWARDLY FROM ITS REAR EXTREMITY, A DOWNWARDLYREDUCED RECESS IN SAID BASE ADJACENT SAID HANDLE DISPOSED IN THE SAMEVERTICAL PLANE AS SAID HANDLE, A CAP MEANS FITTING OVER SAID BASE ANDCONFORMED AT ITS FORWARD EXTREMITY TO THE POURING SPOUT SECTION THEREOF,A DOWNWARDLY REDUCED, WEDGE-SHAPED TONGUE AFFIXED BENEATH THE LOWER,REAR EXTREMITY OF SAID CAP FITTING WITHIN SAID DOWNWARDLY REDUCED RECESSIN SAID BASE, A REDUCED FLEXURE SEC-